An Illinois boat bill of sale is a form that transfers a boat from seller to buyer for an agreedupon price. All municipal, county, and State taxes in relation to the purchase of the boat, including sales taxes, are ☐ included ☐ not included in the purchase price. 7.Complete your Illinois bill of sale for selling a boat here. Our bills of sale meet the state requirements. Fillable Illinois Boat Bill of Sale has three pages and six sections to be filled. Fill out the boat details on the bill of sale, including year, make, model, HIN (hull identification number), dimensions, etc.